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Editorial Team
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Editorial Team
Asked: June 15, 20262026-06-15T02:58:24+00:00 2026-06-15T02:58:24+00:00

Possible Duplicate: Rails 2.3-style plugins and deprecation warnings running task in Heroku DEPRECATION WARNING:

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Possible Duplicate:
Rails 2.3-style plugins and deprecation warnings running task in Heroku

DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support
 for these plugins will be removed in Rails 4.0. Move them out and bundle them i
n your Gemfile, or fold them in to your app as lib/myplugin/* and config/initial
izers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonr
ails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required
)> at /app/Rakefile:7)

shows 3 times, sometimes shows 2 times what it means? is there any special meaning?
How to solve this problem for db:migrate

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  1. Editorial Team
    Editorial Team
    2026-06-15T02:58:25+00:00Added an answer on June 15, 2026 at 2:58 am

    Heroku “injects” some plugins during slug compilation.

    -----> Rails plugin injection
           Injecting rails_log_stdout
           Injecting rails3_serve_static_assets
    

    See Rails 2.3-style plugins and deprecation warnings running task in Heroku

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